80491320 has 432 divisors, whose sum is σ = 341719560. Its totient is φ = 16982784.

The previous prime is 80491319. The next prime is 80491337. The reversal of 80491320 is 2319408.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 6191634 + ... + 6191646.

Almost surely, 2^80491320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80491320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170859780).

80491320 is an abundant number, since it is smaller than the sum of its proper divisors (261228240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80491320 is a wasteful number, since it uses less digits than its factorization.

80491320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66 (or 30 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 80491320 is about 8971.6954919346. The cubic root of 80491320 is about 431.7672357188.

The spelling of 80491320 in words is "eighty million, four hundred ninety-one thousand, three hundred twenty".